# OptiUniverse vs COSMOS

The clearest difference is in-app purchases: OptiUniverse at none against COSMOS's 3. COSMOS's advantage is iOS requirement (15.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. COSMOS sells 3 one-off in-app purchases. OptiUniverse asks for nothing beyond the download.

OptiUniverse ships an update every 10 days, COSMOS every 2 weeks. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | OptiUniverse | COSMOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/cosmos-3d-solar-system/id6792780408/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 421 MB | 8 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Maksim Doroshenko](https://appshunter.io/developer/1058512649) | [yuudai tasaki](https://appshunter.io/developer/1861229093) |

## What reviewers say

### OptiUniverse

[App page](https://appshunter.io/ios/app/optiuniverse/id6751552499)

**Features:** macOS Compatibility, iPhone Duo support

**In-app purchases:** none


### COSMOS

[App page](https://appshunter.io/ios/app/cosmos-3d-solar-system/id6792780408)

Explore a real-time 3D model of the solar system with accurate planetary positions and photo-realistic textures. Control time to view past or future celestial events and learn about planets and moons. This app is free and works offline.

**Highlights:** Real-time planetary orbits, Photo-realistic textures, Time control for past/future viewing, Free and offline functionality, Detailed planet information, Exploration via pinch and swipe

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support the Developer | $1.99 | one-time |
| Support the Developer | $4.99 | one-time |
| Support the Developer | $9.99 | one-time |


## Frequently asked questions

### Is OptiUniverse free?

OptiUniverse is free to download, with no in-app purchases.

### Is COSMOS free?

COSMOS is free to download, with in-app purchases available.

### Do OptiUniverse or COSMOS have ads?

Neither OptiUniverse nor COSMOS shows ads.

### Which is updated more often, OptiUniverse or COSMOS?

OptiUniverse ships an update every 10 days, and COSMOS every 2 weeks. Most recently, OptiUniverse was updated on November 5, 2026 and COSMOS on November 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*